Why it's similar
DoorDash is the largest-scale swap: order food, groceries, and more from a huge network with live tracking, mirroring Grubhub's delivery core. Its 4.77 rating across 22M reviews makes it the most-reviewed delivery app on this list, with wide US coverage.
How it differs
DoorDash runs its own separate restaurant network and Dasher fleet rather than Grubhub's, so available restaurants, fees, and promos differ by city. Its DashPass membership and broad grocery-and-retail selection give it a different structure than Grubhub.
